US5377736A - Driven axle vehicle inflation system - Google Patents
Driven axle vehicle inflation system Download PDFInfo
- Publication number
- US5377736A US5377736A US08/154,066 US15406693A US5377736A US 5377736 A US5377736 A US 5377736A US 15406693 A US15406693 A US 15406693A US 5377736 A US5377736 A US 5377736A
- Authority
- US
- United States
- Prior art keywords
- axle
- air
- sleeve
- sealing
- passageway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
- B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
Definitions
- the present invention relates to a central tire inflation system and in particular to such an air inflation system for supplying air through a driven axle of a vehicle through a rotatable coupling.
- CTIS central tire inflation systems
- the present invention is particularly useful for providing a rotatable air coupling for supplying air through the driven axle of a vehicle to tires thereon.
- the present invention is directed to an air inflation system for tires on a vehicle having at least one driven axle with at least one pneumatic tire at each end of each axle in which the vehicle includes an air supply.
- the system includes an air line connected to the air supply and the axle includes a longitudinally extending air passageway therein and a radially extending air passage connected to the longitudinal passage and extending out of the side of the axle.
- An air connection is provided between the longitudinal air passageway and each tire at the end of the axle.
- a rotatable air coupling is connected between the air line and the radially extending air passageway and includes a stationary tubular sleeve surrounding the axle and having a port in fluid communication with the air line.
- First and second seal means are respectively positioned at and seal against opposite ends of the sleeve.
- the first and second seal means are rotatable with the axle and sealingly engage the axle.
- Means are provided biasing the first and second seal means into sealing engagement with the sleeve.
- first and second seal means include beveled sealing surfaces and the ends of the sleeve include coacting beveled ends whereby the sleeve is supported off of the axle.
- the biasing means include first and second rings respectively positioned adjacent to and connected to the first and second sealing means.
- the rings are secured to and rotate with the axle and spring means are positioned between the first and second rings and the first and second seal means, respectively.
- the sleeve is metal and the seal means include graphite sealing surfaces.
- FIG. 1 is a fragmentary, perspective elevational view of the present invention installed in a truck-trailer
- FIG. 2 is an end elevational view illustrating the connection of the air control system to the two tires of FIG. 1,
- FIG. 3 is an enlarged fragmentary elevational view, in cross section, illustrating the air connection through a driven axle
- FIG. 4 is an enlarged, exploded and fragmentary elevational view of the rotatable air coupling of the present invention
- FIG. 5 is a fragmentary enlarged, cross-sectional view, of the air coupling of FIG. 4, and
- FIG. 6 is a an enlarged elevational view illustrating the control system of the present invention.
- the reference numeral 10 generally indicates a conventional vehicle, such as an eighteen wheel truck-trailer, having a plurality of axles, only one of which, such as driven axle 12 driven by a differential 15, is shown with wheels having pneumatic tires.
- axle 12 includes two tires 16 and 18.
- vehicle 10 also includes an air supply line 24 (FIG. 6) from a pump and air tank (not shown) for supplying air pressure to the brakes on the vehicle 10.
- the above description of a vehicle 10 with pneumatic tires and a conventional air supply system is well known.
- the present invention is directed to providing an air control system 30 which is continuously connected to the pneumatic tires including the tires 16 an 18 on the vehicle 10 to provide an equal pressure thereby improving the safety of the vehicle 10 and operator, and to provide even and long life of the expensive tires.
- the air control system of the present invention is directed to providing air to each tire from the fixed air control system 30 through a rotatable coupling for allowing rotation of the tires such as 16 and 18 while connected to the air control system 30, and further to provide such a system through the driven axles, such as 12, of the vehicle 10.
- the air control system includes the air supply 24 which may have 120 psi air pressure, which may be connected to a manual off-on valve 42 for connecting or disconnecting the air control system, and a regulator 36.
- the air pressure regulator may be of any conventional type and is typically set at between 100-110 psi cold setting as this is the normal air pressure carried in the truck-trailer tires of an eighteen wheeler truck-trailer.
- One satisfactory type of air regulator is Model 56-110 sold by Air Dirco.
- the system 30 may include an unloader valve 46 which is normally open but closes in the event that the output air pressure from the pressure regulator 36 falls below a predetermined value.
- the unloader valve is normally open for supplying air to all of the tires and has a predetermined set point pressure lower than the predetermined outlet pressure and the unloader valve closes on a drop in outlet pressure of the air supply below the predetermined set point thereby shutting off air to all of the tires for preventing further loss of air from the air supply and opens upon an increase in outlet pressure of the air supply above the predetermined set point. This prevents loss of supply air thereby protecting the air supply 24 and allowing it to maintain sufficient air pressure to actuate the air brakes on the vehicle 10.
- One suitable unloader valve is No. 3X818, sold by Control Devices, Inc.
- the air line 38 provides the outlet air from the control system 30 to all of the tires.
- the axle 12 includes a coaxially longitudinally extending air passage 20 therein extending from the end 21 of the axle 12 to preferably midway through the axle 12.
- a radially extending air passage 13 is connected to the longitudinal passageway 20 and extends out of the side of the driven axle 12.
- a rotatable air coupling is connected between the air line 38 and the radially extending air passageway 13.
- the rotatable air coupling generally includes a stationary tubular sleeve 22 surrounding the driven axle 12 and having a port 23 in fluid communication with the air line 38.
- the tubular sleeve 22 has an interior 27 spaced from the exterior of the driven axle 12 and is supported from the vehicle 10 by the air line connection 38.
- the sleeve 22 is metal and includes beveled ends 24 and 25, preferably hardened with a mirror finish.
- a first seal means 26 and a second seal means 28 are respectively positioned at opposite ends of the sleeve 22 and rotate with the axle 12 and sealingly engage the axle 12 such as by O-rings 40.
- the seal means 26 and 28 include beveled sealing surfaces 50 and 52 for coacting with the beveled surfaces 24 and 25, respectively, of the sleeve 22.
- the beveled sealing surfaces 50 and 52 are of a good sealing but slidable surface such as graphite.
- the coacting beveled surfaces 50, 52, 24 and 25 act to center and support the sleeve 22 off of the axle 12.
- Air from the control system 30 passes to line 38 which is in communication with the interior of the sleeve 22 to the port 23 and thus in communication with the air passageways 13 and 20 for supplying air to the tires 16 and 18. While the sleeve 22 is stationary, the rotating sleeves 26 and 28 maintain a sealing engagement with the opposite ends of the sleeve 22 as well as a sealing engagement with the exterior of the driven axle 12 to provide a long lasting rotating air coupling.
- the air connection includes a tee 70 having a first 72 and a second 74 similar tire connections for two tires, such as 16 and 18.
- a connection 51 consisting preferably of a male 76 and female 78 connectible and disconnectible coupling for conveniently disconnecting the tire 16 from the system 30 for repair or replacement.
- the tire connection 72 includes a pressure test valve stem 80 for testing the air in the tire 16.
- a flexible hose 82 completes the connection 51 to the valve stem of the outside of the tire 16.
- a conventional check valve such as Model MJCV-1, sold by Control Devices, Inc. is included in the male connector 76.
- Tire connection 74 to the inside wheel 18 is also connected to the tee 54 and includes similar parts to those in the tire connection to the tire 16 which are similarly numbered with the addition of the suffix "a".
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/154,066 US5377736A (en) | 1993-11-18 | 1993-11-18 | Driven axle vehicle inflation system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/154,066 US5377736A (en) | 1993-11-18 | 1993-11-18 | Driven axle vehicle inflation system |
Publications (1)
Publication Number | Publication Date |
---|---|
US5377736A true US5377736A (en) | 1995-01-03 |
Family
ID=22549860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/154,066 Expired - Lifetime US5377736A (en) | 1993-11-18 | 1993-11-18 | Driven axle vehicle inflation system |
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US (1) | US5377736A (en) |
Cited By (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6105645A (en) * | 1998-05-14 | 2000-08-22 | Ingram; Anthony L. | Rotary union assembly for use in air pressure inflation systems for tractor trailer tires |
WO2001002196A1 (en) * | 1999-07-02 | 2001-01-11 | Pressure Guard, Inc. | On-axle tire inflation system |
US6220325B1 (en) * | 1997-12-20 | 2001-04-24 | Zf Friedrichshafen Ag | Air guide for a tire pressure regulating device |
US6260595B1 (en) * | 1999-08-04 | 2001-07-17 | Meritor Heavy Vehicle Systems, Llc | Unitized hub cap |
US6286565B1 (en) * | 2000-08-25 | 2001-09-11 | Zebulen Pike | Central tire inflation system and method |
US6325124B1 (en) * | 2000-02-03 | 2001-12-04 | Col-Ven S.A. | Pneumatic rotary wheel coupling |
US6394159B1 (en) | 2001-01-26 | 2002-05-28 | Meritor Heavy Vehicle Technology, Llc | Hub cap filter for tire inflation system |
US6435238B1 (en) * | 2001-03-22 | 2002-08-20 | Equalaire Systems, Inc. | Combination of an automatic tire inflation system and anti-locking braking system |
US6705369B1 (en) * | 2002-02-22 | 2004-03-16 | Vincent T. Russell | Deformable valve extension support with retention flanges |
US20040244896A1 (en) * | 2003-06-09 | 2004-12-09 | Jarrett Larry G. | Expandable spindle plug assembly for use with automatic tire inflation systems |
US20050161136A1 (en) * | 2004-01-27 | 2005-07-28 | Hayes Brian D. | Central tire inflation system for drive axle |
US20050179314A1 (en) * | 2003-08-22 | 2005-08-18 | Bence Csak | Trailer and semi-trailer braking system |
US20060018766A1 (en) * | 2004-07-21 | 2006-01-26 | Stanczak Edmund A | Tire inflation system with pressure limiter |
US7201066B1 (en) | 2005-03-30 | 2007-04-10 | The Board Of Regents For Oklahoma State University | System for automatic tire inflation |
US20080127773A1 (en) * | 2006-11-13 | 2008-06-05 | Solie John B | Apparatus for delivering air through powered axle assemblies |
US20090283190A1 (en) * | 2008-05-16 | 2009-11-19 | Hendrickson Usa, L.L.C. | Integrated rotary union and hub cap |
US7918462B1 (en) * | 2006-02-14 | 2011-04-05 | Star Field Fit, Inc. | System and method for facilitating turbine labyrinth packing |
US20110180192A1 (en) * | 2010-01-25 | 2011-07-28 | Stech Clyde G | Drive axle seal body and tire inflation system |
US8028732B1 (en) | 1998-05-14 | 2011-10-04 | Airgo Ip, Llc | Tire inflation system |
US20120032793A1 (en) * | 2010-07-30 | 2012-02-09 | Frank Joseph Sonzala | Visual wheel end assembly high-temperature warning system |
US20120067482A1 (en) * | 2010-01-25 | 2012-03-22 | Stech Clyde G | Axle to axle sealed airway for an onboard automatic tire inflation system |
WO2012071579A1 (en) | 2010-11-24 | 2012-05-31 | Fleet Technologies Llc | Axle to axle sealed airway for an onboard automatic tire inflation system |
US20120318422A1 (en) * | 2011-06-15 | 2012-12-20 | Lloyd Jefffrey M | Rotating seal assembly for tire inflation system |
US8910683B2 (en) | 2010-07-29 | 2014-12-16 | Equalaire Systems, Inc. | Steer axle high-temperature warning system |
US8919401B2 (en) | 2003-09-09 | 2014-12-30 | Equalaire Systems, Inc. | Wheel end assembly high-temperature warning system |
US9370974B2 (en) | 2013-03-15 | 2016-06-21 | Dana Heavy Vehicle Systems Group, Llc | Assembly for a tire inflation system |
US9375985B2 (en) | 2010-08-23 | 2016-06-28 | Equalaire Systems, Inc. | Valve stem with auxiliary port |
US9789739B1 (en) | 2013-04-23 | 2017-10-17 | Equalaire Systems, Inc. | Small trailer tire inflation system |
US9908373B2 (en) | 2010-06-21 | 2018-03-06 | Equalaire Systems, Inc. | Rotary air connection with central valve for tire inflation system |
US10005325B2 (en) | 2016-03-31 | 2018-06-26 | Airgo Ip, Llc | Tire pressure management system |
US10086660B1 (en) | 2016-03-31 | 2018-10-02 | Airgo Ip, Llc | Tire pressure management system |
US10343467B1 (en) | 2016-11-08 | 2019-07-09 | Airgo Ip, Llc | Tire inflation system safety valve |
US10471782B2 (en) | 2015-03-05 | 2019-11-12 | Equalaire Systems, Inc. | Steer axle tire inflation system |
US10543849B2 (en) | 2016-03-31 | 2020-01-28 | Airgo Ip, Llc | Vehicle operational diagnostics and condition response system |
US10556469B2 (en) | 2015-09-17 | 2020-02-11 | Dana Heavy Vehicle Systems Group, Llc | Hub cap assembly and a wheel end assembly for a tire inflation system |
US10562357B2 (en) | 2015-06-12 | 2020-02-18 | Dana Heavy Vehicle Systems Group, Llc | Rotary joint air collector ring and the tire inflation system made therewith |
US10562356B2 (en) | 2013-11-11 | 2020-02-18 | Equalaire Systems, Inc. | Rotary union for tire inflation system |
US10596864B1 (en) | 2016-11-08 | 2020-03-24 | Airgo Ip, Llc | Tire inflation system safety valve |
US10596863B1 (en) | 2016-03-31 | 2020-03-24 | Airgo Ip, Llc | Tire pressure management system |
US10596862B1 (en) | 2016-03-31 | 2020-03-24 | Airgo Ip, Llc | Dynamic wheel management system |
US10647169B1 (en) | 2016-03-31 | 2020-05-12 | Airgo Ip, Llc | Tire pressure management system |
US10696106B2 (en) | 2013-10-23 | 2020-06-30 | Equalaire Systems, Inc. | Rotary union for automatic tire inflation system |
US10766316B1 (en) | 2016-11-08 | 2020-09-08 | Airgo Ip, Llc | Combination in line tire pressure measurement sensor and tire pressure safety valve |
US11254170B2 (en) | 2017-04-13 | 2022-02-22 | Tesla, Inc. | Automatic tire inflation system with thru-hub air feed |
US11654928B2 (en) | 2020-07-28 | 2023-05-23 | Airgo Ip, Llc | Vehicle operational diagnostics, condition response, vehicle pairing, and blind spot detection system |
US11685201B2 (en) | 2016-10-19 | 2023-06-27 | Pressure Systems International, Llc | Inflation manifold |
US11752810B2 (en) | 2020-07-28 | 2023-09-12 | Airgo Ip, Llc | Steer axle pressure management system |
US12014583B2 (en) | 2020-07-28 | 2024-06-18 | Airgo Ip, Llc | Vehicle operational diagnostics and trailer health status system combination |
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US4883106A (en) * | 1989-01-19 | 1989-11-28 | Eaton Corporation | Rotary wheel-end assembly for tire inflation system |
US5080157A (en) * | 1985-12-04 | 1992-01-14 | Man Nutzfahrzeuge Ag | Seal for use between relatively rotating members |
US5080156A (en) * | 1990-02-12 | 1992-01-14 | Bartos Josef A | Vehicle wheel and axle assembly for controlling air pressure in tires with spaces between the bearing elements and the race members included in the air flow path |
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-
1993
- 1993-11-18 US US08/154,066 patent/US5377736A/en not_active Expired - Lifetime
Patent Citations (11)
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Cited By (74)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6220325B1 (en) * | 1997-12-20 | 2001-04-24 | Zf Friedrichshafen Ag | Air guide for a tire pressure regulating device |
US6105645A (en) * | 1998-05-14 | 2000-08-22 | Ingram; Anthony L. | Rotary union assembly for use in air pressure inflation systems for tractor trailer tires |
US7975739B1 (en) | 1998-05-14 | 2011-07-12 | Airgo Ip, Llc | Rotary union assembly for use in air pressure inflation systems for tractor trailer tires |
US8028732B1 (en) | 1998-05-14 | 2011-10-04 | Airgo Ip, Llc | Tire inflation system |
WO2001002196A1 (en) * | 1999-07-02 | 2001-01-11 | Pressure Guard, Inc. | On-axle tire inflation system |
US6425427B1 (en) * | 1999-07-02 | 2002-07-30 | Innovative Transportation Products, Inc. | On-axle tire inflation system |
US6260595B1 (en) * | 1999-08-04 | 2001-07-17 | Meritor Heavy Vehicle Systems, Llc | Unitized hub cap |
US6325124B1 (en) * | 2000-02-03 | 2001-12-04 | Col-Ven S.A. | Pneumatic rotary wheel coupling |
US6286565B1 (en) * | 2000-08-25 | 2001-09-11 | Zebulen Pike | Central tire inflation system and method |
US6394159B1 (en) | 2001-01-26 | 2002-05-28 | Meritor Heavy Vehicle Technology, Llc | Hub cap filter for tire inflation system |
US6871683B2 (en) | 2001-01-26 | 2005-03-29 | Meritor Heavy Vehicle Technology, Llc | Hub cap filter for tire inflation system |
WO2002076771A1 (en) * | 2001-03-22 | 2002-10-03 | Equalaire Systems, Inc. | Combination of an automatic tire inflation system and anti-locking braking system |
US6435238B1 (en) * | 2001-03-22 | 2002-08-20 | Equalaire Systems, Inc. | Combination of an automatic tire inflation system and anti-locking braking system |
US6705369B1 (en) * | 2002-02-22 | 2004-03-16 | Vincent T. Russell | Deformable valve extension support with retention flanges |
US6938658B2 (en) * | 2003-06-09 | 2005-09-06 | Airgo Ip, Llc | Expandable spindle plug assembly for use with automatic tire inflation systems |
US20040244896A1 (en) * | 2003-06-09 | 2004-12-09 | Jarrett Larry G. | Expandable spindle plug assembly for use with automatic tire inflation systems |
US20050115655A1 (en) * | 2003-06-09 | 2005-06-02 | Jarrett Larry G. | Expandable spindle plug assembly for use with automatic tire inflation systems |
US7117909B2 (en) | 2003-06-09 | 2006-10-10 | Airgo Ip, Llc | Expandable spindle plug assembly for use with automatic tire inflation systems |
US20050179314A1 (en) * | 2003-08-22 | 2005-08-18 | Bence Csak | Trailer and semi-trailer braking system |
US8919401B2 (en) | 2003-09-09 | 2014-12-30 | Equalaire Systems, Inc. | Wheel end assembly high-temperature warning system |
US20050161136A1 (en) * | 2004-01-27 | 2005-07-28 | Hayes Brian D. | Central tire inflation system for drive axle |
CN100393538C (en) * | 2004-01-27 | 2008-06-11 | 阿文美驰技术有限责任公司 | Central tire inflation system for drive axle |
US7185688B2 (en) | 2004-01-27 | 2007-03-06 | Arvinmeritor Technology, Llc | Central tire inflation system for drive axle |
US20060018766A1 (en) * | 2004-07-21 | 2006-01-26 | Stanczak Edmund A | Tire inflation system with pressure limiter |
US8245746B2 (en) | 2004-07-21 | 2012-08-21 | Arvinmeritor Technology, Llc | Tire inflation system with pressure limiter |
US7201066B1 (en) | 2005-03-30 | 2007-04-10 | The Board Of Regents For Oklahoma State University | System for automatic tire inflation |
US7918462B1 (en) * | 2006-02-14 | 2011-04-05 | Star Field Fit, Inc. | System and method for facilitating turbine labyrinth packing |
US7918461B1 (en) * | 2006-02-14 | 2011-04-05 | Star Field Fit, Inc. | System and method for facilitating turbine labyrinth packing |
US20080127773A1 (en) * | 2006-11-13 | 2008-06-05 | Solie John B | Apparatus for delivering air through powered axle assemblies |
US7896045B2 (en) | 2006-11-13 | 2011-03-01 | The Board Of Regents For Oklahoma State University | Apparatus for delivering air through powered axle assemblies |
US20090283190A1 (en) * | 2008-05-16 | 2009-11-19 | Hendrickson Usa, L.L.C. | Integrated rotary union and hub cap |
US8505600B2 (en) | 2008-05-16 | 2013-08-13 | Hendrickson Usa, L.L.C. | Integrated rotary union and hub cap |
CN102821982A (en) * | 2010-01-25 | 2012-12-12 | 富力特科技公司 | Drive axle seal body and tire inflation system |
US20120067482A1 (en) * | 2010-01-25 | 2012-03-22 | Stech Clyde G | Axle to axle sealed airway for an onboard automatic tire inflation system |
US8327895B2 (en) | 2010-01-25 | 2012-12-11 | Fleet Technologies Llc | Drive axle seal body and tire inflation system |
WO2011090787A1 (en) | 2010-01-25 | 2011-07-28 | Fleet Technologies Llc | Drive axle seal body and tire inflation system |
US8869850B2 (en) * | 2010-01-25 | 2014-10-28 | Fleet Technologies, LLC | Axle to axle sealed airway for an onboard automatic tire inflation system |
US20110180192A1 (en) * | 2010-01-25 | 2011-07-28 | Stech Clyde G | Drive axle seal body and tire inflation system |
US9908373B2 (en) | 2010-06-21 | 2018-03-06 | Equalaire Systems, Inc. | Rotary air connection with central valve for tire inflation system |
US10179484B2 (en) | 2010-07-29 | 2019-01-15 | Equalaire Systems, Inc. | Steer axle high-temperature warning system |
US9789730B2 (en) | 2010-07-29 | 2017-10-17 | Equalaire Systems, Inc. | Steer axle high-temperature warning system |
US10668777B2 (en) | 2010-07-29 | 2020-06-02 | Equalaire Systems, Inc. | Steer axle tire inflation system |
US8910683B2 (en) | 2010-07-29 | 2014-12-16 | Equalaire Systems, Inc. | Steer axle high-temperature warning system |
US20120032793A1 (en) * | 2010-07-30 | 2012-02-09 | Frank Joseph Sonzala | Visual wheel end assembly high-temperature warning system |
US9375985B2 (en) | 2010-08-23 | 2016-06-28 | Equalaire Systems, Inc. | Valve stem with auxiliary port |
CN103328234A (en) * | 2010-11-24 | 2013-09-25 | 弗利特科技有限责任公司 | Axle to axle sealed airway for an onboard automatic tire inflation system |
WO2012071579A1 (en) | 2010-11-24 | 2012-05-31 | Fleet Technologies Llc | Axle to axle sealed airway for an onboard automatic tire inflation system |
US8746305B2 (en) * | 2011-06-15 | 2014-06-10 | Arvinmeritor Technology, Llc | Rotating seal assembly for tire inflation system |
US20120318422A1 (en) * | 2011-06-15 | 2012-12-20 | Lloyd Jefffrey M | Rotating seal assembly for tire inflation system |
US9370974B2 (en) | 2013-03-15 | 2016-06-21 | Dana Heavy Vehicle Systems Group, Llc | Assembly for a tire inflation system |
US10239364B2 (en) | 2013-04-23 | 2019-03-26 | Equalaire Systems, Inc. | Small trailer tire inflation system |
US9789739B1 (en) | 2013-04-23 | 2017-10-17 | Equalaire Systems, Inc. | Small trailer tire inflation system |
US10166821B2 (en) | 2013-04-23 | 2019-01-01 | Equalaire Systems, Inc. | Small trailer tire inflation system |
US10696106B2 (en) | 2013-10-23 | 2020-06-30 | Equalaire Systems, Inc. | Rotary union for automatic tire inflation system |
US10562356B2 (en) | 2013-11-11 | 2020-02-18 | Equalaire Systems, Inc. | Rotary union for tire inflation system |
US11813898B2 (en) | 2013-11-11 | 2023-11-14 | Pressure Systems International, Llc | Rotary union for tire inflation system |
US10471782B2 (en) | 2015-03-05 | 2019-11-12 | Equalaire Systems, Inc. | Steer axle tire inflation system |
US10562357B2 (en) | 2015-06-12 | 2020-02-18 | Dana Heavy Vehicle Systems Group, Llc | Rotary joint air collector ring and the tire inflation system made therewith |
US10556469B2 (en) | 2015-09-17 | 2020-02-11 | Dana Heavy Vehicle Systems Group, Llc | Hub cap assembly and a wheel end assembly for a tire inflation system |
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